JP7144674B2 - vehicle seat - Google Patents

Description

It relates to a vehicle seat with an airbag.

A rear seat vehicle seat, which has an airbag module in the seat back and supports the back of the occupant in a standing position in which the seat back faces substantially forward, and in which the seat back is tilted forward so that the back surface of the seat back is facing forward. There is one that can be displaced to a storage position that is continuous with the luggage compartment floor (for example, Patent Document 1). The seat back of the vehicle seat disclosed in Patent Document 1 includes a back frame serving as a framework and a plate-like back panel coupled to the back surface of the back frame. The back frame includes a metal pipe member that is bent into a substantially rectangular shape, and the rear panel has a substantially rectangular plate shape that covers the rear surface of the pipe member.

The rear panel is provided with an extended portion that protrudes from the back frame to the outside of the vehicle. A plurality of bosses projecting toward the back frame are formed in the extended portion, and the airbag module is fastened to the tip end face of each boss.

Japanese Patent No. 5169864

Since the airbag module is directly fastened to the rear panel, the load applied to the rear surface of the seatback is likely to be transmitted to the airbag module, and the load may change the position of the airbag module.

SUMMARY OF THE INVENTION In view of the above background, an object of the present invention is to make it difficult for a load applied to the back surface of the seat back to be transmitted to the air bag module in a vehicle seat having an air bag module provided in the seat back.

In order to solve the above-described problems, a vehicle seat (1, 300, 400) according to one aspect of the present invention includes a pair of left and right side members (26, 301) extending vertically to form a skeleton of a seat back. A frame-shaped seatback frame portion (19) to be formed, and an extension portion (32, 410) arranged behind the seatback frame portion and extending to the outside of the vehicle of the side member on the outside of the vehicle. a plate-shaped plate (20, 402) attached to the side member; an attachment member coupled to the side member; and an airbag module ( 23), wherein a gap (S) is provided between the airbag module and the extension.

According to this aspect, since the gap is provided between the airbag module and the extending portion, the load applied to the extending portion is less likely to be transmitted to the airbag module. As a result, movement of the airbag module can be prevented.

Also according to one aspect of the invention, the mounting members comprise a first mounting member (36, 302) directly connected to the side member (26) and a second mounting member (36, 302) directly connected to the airbag module. a member (47, 303), wherein the second attachment member is fastened to the first attachment member using a fastener (72), and the plate has a through hole ( 74) is preferably provided.

According to this aspect, the second mounting member can be fastened to the first mounting member from the rear of the pan frame by inserting the tool into the through hole. Thereby, the airbag module can be easily assembled to the side member.

In addition, according to one aspect of the present invention, the side member includes an inclined wall (64) that is inclined toward the vehicle interior toward the rear at the rear portion of the first mounting member, and the second mounting member is attached to the inclined wall (64). is preferably provided with a fastening portion (65) to which is fastened.

According to this aspect, the fastening portion is provided on the inclined wall facing diagonally rearward. Thereby, the fastening portion can be provided at a position that can be visually recognized from behind the plate.

Further, according to one aspect of the present invention, the second mounting member has a plate-like fastened portion (69) along the inclined wall at the rear portion, and the airbag module has an airbag that deploys forward. and coupled to the second mounting member on the front side of the to-be-fastened portion.

According to this aspect, since the airbag module is positioned in front of the fastened portion, the airbag is less likely to come into contact with the fastener when the airbag is deployed forward. Therefore, deformation of the airbag during deployment can be prevented.

In addition, according to one aspect of the present invention, the side member (301) on the vehicle exterior side extends to the vehicle exterior side and includes an extension wall (305) having a surface facing upward, a first mounting member coupled to the vehicle exterior side surface of the side member; and an upper wall (311) extending toward the vehicle interior along the upper surface of the extension wall at its upper end and fastened to the extension wall; It may also include a second mounting member (303) which engages said first mounting member at its lower end.

According to this aspect, since the airbag module can be fastened to the side member by inserting the tool downward, the airbag module can be coupled to the side member without being hindered by the plate.

Further, according to one aspect of the present invention, the extending portion is provided with a cut-and-raised portion (411) that is cut and raised forward, and the mounting member is attached to the vehicle-exterior side surface of the vehicle-exterior side member. The coupled first mounting member and the airbag module are directly connected to each other, and the front end of the second mounting member (401) is engaged with the first mounting member (401), and the rear end of the second mounting member is fastened to the rear surface of the cut-and-raised portion. and an attachment member (403).

According to this aspect, since the second mounting member is coupled to the side member and the plate, the position of the airbag module can be stabilized. Further, since the second mounting member is fastened to the rear surface of the cut-and-raised portion, the second mounting member can be visually recognized from behind the plate when fastening. Thereby, the second attachment member can be easily fastened to the cut-and-raised portion.

According to the above aspect, in the vehicle seat having the airbag module provided in the seatback, since the gap is provided between the airbag module and the pan frame, the load applied to the back surface of the seatback is applied to the airbag module. It becomes difficult to convey.

The mounting members also include a first mounting member directly connected to the side member and a second mounting member directly connected to the airbag module, the second mounting member being attached to the first mounting member using fasteners. According to the mode in which the plate is fastened and provided with a through hole penetrating along the axis of the fastener, the second mounting member can be moved from the rear of the pan frame to the first mounting member by inserting a tool into the through hole. It can be fastened to the mounting member. Thereby, the airbag module can be easily assembled to the side member.

In addition, according to the aspect of the side member, the first mounting member includes an inclined wall that inclines toward the vehicle interior toward the rear at the rear portion, and the inclined wall is provided with a fastening portion to which the second mounting member is fastened, The fastening portion is provided on the inclined wall facing obliquely rearward. Thereby, the fastening portion can be provided at a position that can be visually recognized from behind the plate.

In addition, the second mounting member has a plate-like fastened portion along the inclined wall at the rear, and the airbag module has an airbag that deploys forward, and is connected to the second mounting member on the front side of the fastened portion. According to this aspect, since the airbag module is positioned on the front side of the fastened portion, the airbag is less likely to come into contact with the fastener when the airbag is deployed forward. Therefore, deformation of the airbag during deployment can be prevented.

In addition, the vehicle-exterior side member extends outwardly of the vehicle and includes an extension wall having a surface facing upward. According to the aspect including the second mounting member that extends toward the vehicle interior along the upper surface of the extending wall, has an upper wall that is fastened to the extending wall, and engages the first mounting member at the lower end, the tool is Since the airbag module can be fastened to the side member by inserting it downward, the airbag module can be coupled to the side member without being hindered by the plate.

Further, the extending portion is provided with a cut-and-raised portion that is cut and raised forward, and the mounting member directly connects the airbag module to the first mounting member that is connected to the vehicle-exterior side surface of the vehicle-exterior side member. and the second mounting member having a front end engaged with the first mounting member and a rear end fastened to the rear surface of the cut-and-raised portion, the second mounting member is coupled to the side member and the plate. Therefore, the position of the airbag module can be made more stable. Further, since the second mounting member is fastened to the rear surface of the cut-and-raised portion, the second mounting member can be visually recognized from behind the plate when fastening. Thereby, the second attachment member can be easily fastened to the cut-and-raised portion.

1 is a perspective view of a vehicle seat in use position according to the present invention; FIG. (A) Explanatory drawing for explaining the displacement of the vehicle seat from (A) use position to (B) storage position. 1 is a front perspective view of an upper portion of a frame of a vehicle seat according to a first embodiment; FIG. FIG. 2 is a rear perspective view of the upper portion of the frame of the vehicle seat according to the first embodiment; VV sectional view of FIG. The rear view of the upper portion of the frame of the vehicle seat according to the second embodiment. The side view of the frame upper part of the vehicle seat which concerns on 2nd Embodiment. Sectional view of the upper left end of the seat back of the vehicle seat according to the second embodiment. Sectional view of the upper left part of the seat back of the vehicle seat according to the second embodiment. A perspective view of an upper portion of a vehicle seat frame according to a third embodiment. Sectional view of the seat back upper part of the vehicle seat which concerns on 3rd Embodiment

Three embodiments in which a vehicle seat according to the present invention is applied to the rearmost rear seat of an automobile will be described below with reference to the drawings. In the following description, front/rear, left/right, and up/down directions are described with reference to the front of the vehicle. In addition, as will be described later, the vehicle seat changes its shape and posture between the use position where the passenger sits and the deformed storage position to expand the space that can accommodate luggage, but unless otherwise specified, The shape of each component will be described with reference to the use position.

<<First Embodiment>>
As shown in FIG. 1, a vehicle seat 1 according to the present invention constitutes the left portion of the rear seat in the second row in an automobile having two rows of seats in the front and rear. A vehicle seat 1 is provided on a floor 2 of an automobile, and includes a seat cushion 4 that supports the buttocks of a occupant, a seat back 5 that is supported on the rear portion of the seat cushion 4 and functions as a backrest, and each seat back 5. It has a headrest 6 provided on the top. A substantially horizontal luggage compartment floor 7 (see FIG. 2) connected to a tailgate (rear gate) is provided behind the vehicle seat 1 .

The seat cushion 4 extends left and right to form a seating surface 9 for two passengers. Below the seat cushion 4, a pair of left and right lower rails 10 are provided that are coupled to the upper surface of the floor 2 and extend in the front-rear direction. An upper rail is coupled to each of the lower rails 10 so as to be slidable along the extending direction of the lower rails 10 . The seat cushion 4 is slidably supported on the floor 2 through lower rails 10 and upper rails.

The seat back 5 extends vertically and has a substantially rectangular parallelepiped shape with a surface facing forward. A support surface 12 is formed on the front surface of the seat back 5 to support the backs of two passengers. The seat back 5 is rotatably coupled at its lower end to the rear end of the frame forming the seat cushion 4 via a known reclining mechanism.

Two headrests 6 are provided side by side on the upper end of the seat back 5 . The headrests 6 are coupled to the seatback 5 at their lower ends so as to be rotatable about the left-right direction as an axis.

A strap 15 that protrudes outside the vehicle is provided at the lower portion of the seat cushion 4 outside the vehicle. When the strap 15 is pulled to the outside of the vehicle, the seat cushion 4 and the seat back 5 of the vehicle seat 1 move from the use position (FIG. 2(A)) where the passenger can sit, as shown in FIG. It is displaced to the storage position (FIG. 2(B)) in which the space that can accommodate the luggage is expanded. When the vehicle seat 1 is in the use position, the seating surface 9 of the seat cushion 4 faces upward to support the buttocks of the occupant, and the support surface 12 of the seat back 5 faces substantially forward to support the back of the occupant. I'm on my way. When the vehicle seat 1 is displaced from the use position to the retracted position, the rear part of the seat cushion 4 is lifted and moved forward (a two-dot chain line in FIG. 2A), so that the seating surface 9 faces forward. . At the same time, the seatback 5 is tilted forward and rotated about its lower end (a chain double-dashed line in FIG. 2A), so that the support surface 12 faces substantially downward and its rear surface extends substantially horizontally. When the vehicle seat 1 is in the stowed position, the rear surface of the seat back 5 is continuous with the floor surface 7 of the luggage compartment, and baggage can be placed on the rear surface of the seat back 5. - 特許庁As shown in FIG. 2A, the headrest 6 also extends laterally with respect to the seatback 5 so as not to hinder movement of the seatback 5 when the vehicle seat 1 is displaced from the use position to the retracted position. It should rotate forward on the axis.

In this embodiment, a predetermined lever 17 is provided at the left upper end of the seatback 5 . When the vehicle seat 1 is in the use position, the seat back 5 can be rotated with respect to the seat cushion 4 by operating the lever 17 . This allows the seated person to adjust the angle of the seat back 5 with respect to the seat cushion 4 according to his/her physical constitution.

Next, the structure of the seat back 5 will be described with reference to FIGS. 3 to 5. FIG. As shown in FIG. 5 , the seatback 5 includes a seatback frame 18 as a skeleton, a pad member 21 supported by the seatback frame 18 , and provided on the front surface of the pad member 21 to form the outer surface of the seatback 5 . and an airbag module 23 supported by the seatback frame 18 .

As shown in FIGS. 3 and 4 , the seatback frame 18 forms the framework of the seatback 5 and is arranged behind the seatback frame portion 19 having a substantially rectangular frame shape and the seatback frame portion 19 . and a pan frame 20 (plate). The seat back frame portion 19 includes a pair of left and right side frames 26 (side members) extending vertically, an upper frame 27 extending horizontally and coupled to the upper ends of the left and right side frames 26, and left and right side members extending horizontally. and a lower frame (not shown) coupled to the bottom of each frame 26 . The side frame upper portion 26U and the upper frame 27, which respectively constitute the upper portions of the left and right side frames 26, are formed by bending one circular pipe material 29 into an inverted U-shaped gate shape. A side frame lower portion 26D forming the lower portion of each of the left and right side frames 26 is formed of a sheet metal member 30 having a surface facing in the horizontal direction. The sheet metal member 30 is welded to the end of the pipe material 29 at the upper portion thereof on the inner surface of the sheet. The front and rear edges of the sheet metal member 30 are each bent toward the inside of the seat. The lower ends of the left and right side frames 26 are rotatably coupled to the frame forming the seat cushion 4 via a reclining mechanism.

The pan frame 20 is a plate-like member made of metal, and is arranged along the rear surfaces of the two side frames 26 and the upper frame 27 so that the surfaces face forward and backward. The pan frame 20 includes a pan frame base portion 31 covering rear portions of the side frames 26, the upper frame 27 and the lower frame, and a pan frame extension portion 32 extending from the pan frame base portion 31 to the left side of the side frame 26 on the outside (left side) of the vehicle. and The pan frame 20 is welded to the upper frame 27 at its upper edge, welded to the lower frame at its lower edge, and welded to right and left side frames 26 at its right and left side edges. A plurality of reinforcing beads and lightening holes 31B may be provided at appropriate locations of the pan frame base portion 31 .

A pair of upper and lower brackets 36 (first mounting members) are directly coupled to the left side frame 26 . One retainer 37 (second mounting member) that holds the airbag module 23 is directly coupled to the two brackets 36 . Airbag module 23 is coupled to side frame 26 via retainer 37 and bracket 36 . The airbag module 23 has a substantially rectangular parallelepiped shape extending along the extending direction of the side frame 26, and is arranged so that its outer surface faces the left-right direction.

As shown in FIG. 5 , the airbag module 23 includes an airbag 41 , an inflator 42 that releases gas into the airbag 41 to inflate and deploy the airbag 41 , an airbag 41 and an inflator 42 . A rectangular parallelepiped case 43 is provided. The inflator 42 has a substantially cylindrical shape, and has a male screw portion 44 protruding radially outward from its outer peripheral surface.

The case 43 has a substantially rectangular parallelepiped shape and is composed of a metal case body 45 having an opening on the left side and a resin lid 46 covering the opening of the case body 45 . The case main body 45 has a substantially rectangular bottom wall and side walls coupled to the outer peripheral edge of the bottom wall. A through hole 48 is provided at a predetermined position in the bottom wall of the case main body 45 so as to extend therethrough in the thickness direction. The airbag 41 is folded and housed in the case body 45 .

The male screw portion 44 protrudes from the inside of the case body 45 to the outside through a through hole 48 . The airbag module 23 is coupled to the retainer 37 by fastening the male threaded portion 44 to the retainer 37 .

The lid body 46 has a substantially rectangular shape and is made of a resin plate facing in the left-right direction. In this embodiment, a cylindrical portion that protrudes toward the case main body 45 in a rectangular shape and fits into the opening of the case main body 45 is coupled to the outer peripheral edge of the lid body 46 . A plurality of locking claws projecting outward in the circumferential direction are formed on the outer peripheral surface of the tubular portion. A plurality of through-holes are provided in the side wall of the case main body 45, and the engaging claws are respectively engaged with the through-holes. Thereby, the lid body 46 is coupled to the case main body 45 .

The lid body 46 is provided with a groove-like fragile portion 46W along its front edge and upper and lower edges, and a thin hinge 46H along its rear edge. As a result, when a leftward load is applied to the lid 46, the lid 46 splits at the fragile portion 46W, the central portion of the lid 46 rotates around the hinge 46H, and the case body 45 opens. .

The pan frame extension 32 extends leftward from the left side frame 26 and reaches the left end of the airbag module 23 . The pan frame extending portion 32 is located at a position spaced apart behind the airbag module 23, and a gap S is provided between the pan frame 20 and the airbag module 23 in the front-rear direction. A left edge of the pan frame extending portion 32 is provided with a folded portion 32</b>A that is folded forward in order to increase the rigidity of the pan frame 20 . In this embodiment, as shown in FIG. 3, the upper edge of the pan frame 20 is also folded forward like the left edge and the left edge of the pan frame extending portion 32 .

The pad member 21 is made of a flexible cushioning material such as polyurethane foam. The pad member 21 includes a front portion 50 located behind the support surface 12 and a left side portion 51 extending rearward from the left edge of the front portion 50, as shown in FIG. The front surface portion 50 and the left side surface portion 51 are configured by separate cushion materials. The front portion 50 passes in front of the side frame 26 , the bracket 36 and the retainer 37 and extends to the left front of the airbag module 23 . The left side surface portion 51 extends rearward from the left front of the airbag module 23, passes through the left side of the airbag module 23, and reaches a position substantially aligned with the rear surface of the pan frame 20 in the front-rear direction.

The skin member 22 is formed by stitching together a plurality of sheet-like members such as cloth and leather. The skin member 22 has a front sheet member 54 covering the surface of the front portion 50 and a left side sheet member 55 covering the left side surface of the left side portion 51 . The left edge of the front sheet member 54 and the front edge of the left sheet member 55 are sewn together to form a sewn portion 57 . The sewn portion 57 functions as a fragile portion of the skin member 22 that breaks under a smaller load than other sewn portions. As shown in FIG. 1 , the sewn portion 57 extends vertically along the left front edge of the seat back 5 .

The back surface of the pan frame 20 is provided with a back sheet material 58 formed of a sheet-like member such as cloth or leather, like the upholstery member 22 . One end of the back sheet material 58 is joined to the rear edge of the left side sheet material 55 via a line fastener 59 .

The vehicle seat 1 is provided at a predetermined position with a predetermined sensor 60 for detecting the load applied to the passenger in the rear seat. The sensor 60 may be, for example, a tension sensor that detects tension applied to a seat belt worn by a rear passenger, or an acceleration sensor that detects acceleration applied to the vehicle seat 1 . A control device 61 that is electrically connected to the sensor 60 and the inflator 42 and controls driving of the inflator 42 based on the load detected by the sensor 60 is provided under the vehicle seat 1 . Although the control device 61 is provided on the vehicle seat 1 in this embodiment, it may be provided at any position on the vehicle body.

Next, details of the shapes of the bracket 36 and the retainer 37 will be described. As shown in FIG. 3, the upper and lower brackets 36 are respectively bent sheet metal members and have substantially the same shape. omitted.

As shown in FIG. 5, the bracket 36 includes a substantially square plate-like bracket base 62 that faces in the left-right direction, a bracket front wall 63 connected to the front edge of the bracket base 62, and a rear end of the bracket base 62. and a connected bracket angled wall 64 .

The bracket front wall 63 has a plate shape extending rightward from the front end of the bracket base portion 62 and is welded to the front surface of the sheet metal member 30 forming the left side frame lower portion 26D.

As shown in FIG. 5, the bracket inclined wall 64 has a plate-like shape that is inclined to the right (toward the inside of the vehicle) toward the rear. The rear edge of the bracket inclined wall 64 is welded to the rear surface of the sheet metal member 30 . The bracket inclined wall 64 is provided with a bolt hole 65 (fastening portion) penetrating in the thickness direction. A nut is welded to the front surface of the bracket inclined wall 64 at a position aligned with the bolt hole 65 .

A bracket locking wall 66 is provided on the front portion of the bracket base portion 62 and extends in the front-rear and up-down directions to the right of the front edge of the bracket inclined wall 64 . The rear edge of the bracket locking wall 66 and the front edge of the slanted wall are connected to each other by a connecting wall 67 sloping rightward toward the front. A front edge of the bracket locking wall 66 is connected to the bracket front wall 63 .

The retainer 37 is a bent sheet metal member, and includes a plate-shaped retainer base portion 68 that extends in the front-rear and up-down directions, and a plate-shaped retainer inclined wall 69 that is connected to the rear edge of the retainer base portion 68 and inclined to the right rearward. and A bolt hole 68A is provided through the retainer base 68 in the thickness direction. The airbag module 23 is held on the left side surface of the retainer base 68 by fastening the male threaded portion 44 of the inflator 42 to the bolt hole 68A.

A bolt hole 70 is formed through the retainer inclined wall 69 in the thickness direction. The retainer inclined wall 69 is arranged along the rear surface of the bracket inclined wall 64 , and the retainer 37 is fastened to the bracket 36 with bolts 72 (fasteners) passing through the two bolt holes 65 and 70 .

The pan frame 20 is provided with tool holes 74 for tightening the bolts 72 . The tool hole 74 is a through hole that passes through the pan frame 20 in the thickness direction, and is provided on an extension line of the axis X of the bolt 72 that passes through the bolt holes 65 and 70 . The tool hole 74 is sized such that a tool (for example, a universal wrench) for tightening the bolt 72 can be inserted. As shown in FIG. 5 , the pan frame 20 is provided with a resin sealing member 75 that seals the tool hole 74 .

As shown in FIG. 5, the bracket locking walls 66 of the upper and lower brackets 36 are provided with locking holes 77 penetrating in the thickness direction at predetermined positions. A wire member 78 , which is a metal round bar bent into a predetermined shape, is connected to the hooking hole 77 . As shown in FIG. 3, the wire member 78 has a pair of upper and lower hooks 90 which are provided at both ends thereof and which are respectively latched to the latching holes 77. The wire member 78 extends forward from each of the hooks 90 and extends forward of the airbag module 23. and a hooking portion 94 connecting the front ends of the two connecting portions 92 vertically to each other. The wire member 78 is coupled to the brackets 36 by hooks 90 provided at both ends thereof being hooked into the hook holes 77 of the upper and lower brackets 36 respectively. The connecting portions 92 are connected to the hooks 90 at their rear ends, pass between the bracket locking wall 66 and the retainer base portion 68, reach the right front of the airbag module 23, and bend leftward at their front ends. . In this embodiment, the connecting portion 92 is pressed against the bracket locking wall 66 by the airbag module 23 between the bracket locking wall 66 and the retainer base 68 . As a result, the wire member 78 is clamped between the bracket 36 and the retainer 37 and its movement is restricted.

A webbing 96 is provided on the skin member 22 . The webbing 96 is made of a sheet-like member having a lower stretchability than the outer skin member 22 . One end of the webbing 96 is sewn to the front sheet member 54 and the left side sheet member 55 at the sewn portion 57 . The webbing 96 extends from one end through between the front portion 50 and the left side portion 51 toward the hooking portion 94 of the wire member 78 . A hook 97 is provided at the other end of webbing 96 , and hook 97 is hooked on hook portion 94 of wire member 78 .

Next, the operation of the vehicle seat 1 will be described. When the sensor 60 (FIG. 1) detects that the load applied to the passenger in the rear seat exceeds a predetermined value, the control device 61 controls the inflator 42 to supply gas to the inside of the airbag 41 . As a result, gas is released from the inflator 42, the airbag 41 is inflated, and the lid 46 is pushed leftward. As a result, the fragile portion 46W (FIG. 5) is cleaved and the case 43 is opened.

The airbag 41 is inflated left front by gas supplied from the inflator 42 , passes between the front surface portion 50 and the left side surface portion 51 , and reaches the sewn portion 57 . At this time, a load is applied to the webbing 96 due to the expansion of the airbag 41 . The load applied to webbing 96 breaks seamed portion 57 to form an opening at the upper left end of the front surface of seat back 5 . The airbag 41 passes through the opening, inflates to the left front of the seat back 5, and deploys between the seated occupant and the side wall of the vehicle compartment.

Next, effects of the vehicle seat 1 will be described. In the vehicle seat 1 provided with the airbag 41, when the airbag 41 deploys, a load (reaction force) in the direction opposite to the deploying direction of the airbag 41 is applied to the frame supporting the airbag module 23. FIG. In order to make the deployment direction of the airbag 41 more appropriate and to stabilize the deployment of the airbag 41, the frame supporting the airbag module 23 must have sufficient rigidity to withstand the reaction force applied when the airbag 41 is deployed. is required.

The pan frame 20 is formed of a substantially flat sheet metal member that covers the rear surfaces of the left and right side frames 26 . In order to connect the airbag module 23 to the pan frame 20 and to give the pan frame 20 sufficient rigidity to withstand the reaction force applied when the airbag 41 is deployed, the plate thickness must be increased. However, increasing the plate thickness of the pan frame 20 increases the weight of the seat back frame 18 .

In vehicle seat 1 , airbag module 23 is coupled to side frame 26 . The side frame 26 has an upper portion formed of a pipe material 29 . Further, the lower portion of the side frame 26 is formed by a sheet metal member 30 bent toward the inside of the seat at the front and rear edges. Therefore, the side frames 26 have higher rigidity than the plate-shaped pan frame 20 . By connecting the airbag module 23 to the side frame 26 , the thickness of the pan frame 20 can be made smaller than when the airbag module 23 is supported by the pan frame 20 . As a result, the posture of the airbag module 23 can be stabilized against the reaction force applied when the airbag 41 is deployed, and the weight of the seatback 5 can be reduced.

As shown in FIG. 2, when the vehicle seat 1 is in the stowed position, the rear surface of the seat back 5 is continuous with the floor surface 7 of the luggage compartment, so that the area for placing luggage can be expanded. In order to expand such an area, it is preferable to make the pan frame 20 as large as possible. Therefore, it is conceivable to extend the pan frame 20 to the left of the left side frame 26 . However, if the pan frame 20 is extended, it becomes difficult to access the left side surface of the side frame 26 from behind the seat back 5 after the pad member 21 is arranged on the front surface of the seat back frame 18 . Therefore, it becomes difficult to fasten the airbag module 23 to the side frame 26 .

As shown in FIG. 5 , the pan frame 20 of the vehicle seat 1 is provided with a tool hole 74 . As a result, a tool can be inserted into the tool hole 74 from the rear of the pan frame 20 and the bolt 72 for fastening the retainer 37 and the bracket 36 can be tightened from the rear of the pan frame 20 . As a result, the airbag module 23 can be easily fastened to the side frame 26 from behind the seatback 5 .

Compared to the case where the bolt 72 is fastened to the wall extending in the left-right direction, the rearward protrusion amount of the head of the bolt 72 is smaller when fastened to the wall surface inclined with respect to the left-right direction. In this embodiment, by inclining the bracket inclined wall 64 to which the bolt 72 is fastened with respect to the left-right direction, the rearward protrusion amount of the head of the bolt 72 can be reduced. Further, since the rear surface of the bracket inclined wall 64 faces obliquely rearward, the head of the bolt 72 can be visually recognized from the rear of the pan frame 20, and the work of fastening the retainer 37 and the bracket 36 is facilitated.

The pan frame 20 is provided with a sealing member 75 that seals the tool hole 74 . Therefore, the back surface of the seat back 5 can be made flatter, and the stability of cargo placed on the back surface of the seat back 5 can be improved when the vehicle seat 1 is in the retracted position. Further, since the tool hole 74 is sealed by the sealing member 75, even if the rear surface of the seat back 5 is splashed with liquid such as water from cargo when the vehicle seat 1 is in the retracted position, It is possible to prevent the liquid from dripping and reaching the airbag module 23 .

A gap S is provided between the pan frame 20 and the airbag module 23 . Therefore, the load from the load placed on the back surface of the seatback 5 is not directly applied to the airbag module 23, and the change in the position of the airbag module 23 can be prevented.

The airbag module 23 is fastened to the retainer 37 in front of the bracket inclined wall 64 . Contact with the bolt 72 that fastens the retainer 37 and the bracket 36 of the airbag 41 during deployment can be prevented, and deformation of the airbag 41 during deployment can be prevented. As a result, the airbag 41 can be deployed more reliably.

Brackets 36 are provided on the upper and lower sides of the side frame 26, and the airbag module 23 is coupled to the side frame 26 at two upper and lower positions. As a result, the connection between the airbag module 23 and the side frame 26 is stronger than when the airbag module 23 is connected to the side frame 26 at one point, and the posture of the airbag 41 during deployment is improved. can be stabilized.

As shown in FIGS. 1 and 3, both the stitching portion 57 and the hooking portion 94 extend vertically, and the webbing 96 is hooked on the stitching portion 57 and the hooking portion 94 at the ends thereof. Thereby, the webbing 96 forms a surface extending vertically and horizontally in front of the airbag module 23 . Therefore, when the airbag 41 inflates forward, the load is easily applied to the webbing 96 , and the load due to the inflation of the airbag can be concentrated in the sewn portion 57 .

<<Second Embodiment>>
A vehicle seat 300 according to the second embodiment differs from the first embodiment in the shape of a side frame 301, the shape of a bracket 302, the shape of a retainer 303, and the shape of a wire member 304. FIG. A description of the same configuration as in the first embodiment will be omitted. As in the first embodiment, the side frame 26 is provided with a pair of upper and lower brackets 302. Since the lower bracket 302 and the upper bracket 302 are of the same type, only the upper bracket 302 will be described in detail. , and description of the lower bracket 302 is omitted.

As shown in FIGS. 6 and 7, the side frame 301 differs from the first embodiment in that it has an extension wall 305 extending leftward at its upper end. The extending wall 305 is substantially horizontal and has a plate-like shape with a surface facing in the vertical direction. The extending wall 305 is provided with a bolt hole 306 penetrating vertically. In this embodiment, a portion of the sheet metal member 30 that constitutes the side frame lower portion 26D extends upward at a substantially center portion in the front-rear direction, and the upper end thereof is bent leftward to form an extension wall 305. .

Bracket 302 is positioned below extension wall 305 and is coupled to the left side surface of sheet metal member 30 . The bracket 302 has a plate-like bracket base portion 307 facing in the horizontal direction and having surfaces extending in the front-rear and up-down directions, a bracket front portion 308 extending rightward from the front edge of the bracket base portion 307, and a bracket base portion 307 extending rightward from the rear edge of the bracket base portion 307. and a bracket rear portion 309 extending to the The bracket front portion 308 has a forwardly extending flange 308A at its right end and is welded to the left side surface of the sheet metal member 30 at the flange 308A. The bracket rear portion 309 has a rearwardly extending flange 309A at its right end and is welded to the left side surface of the sheet metal member 30 at the flange 309A.

The retainer 303 is a bent sheet metal member, and includes a plate-shaped retainer base 310 having a surface facing the left-right direction and extending in the extending direction of the side frame 26 , and a wall 305 extending from the upper end of the retainer base 310 . It has a retainer upper wall 311 extending rightward along the upper surface and a retainer hooking portion 312 connected to the lower end of the retainer base portion 310 .

The retainer upper wall 311 is positioned above the extension wall 305 and abuts on the upper surface of the extension wall 305 on its lower surface. A bolt hole 313 is provided in the retainer upper wall 311 . A nut is welded to the lower surface of the extension wall 305 at a position aligned with the bolt hole 306, and a bolt 315 passing through the two bolt holes 306 and 313 is used to fasten the retainer upper wall 311 and the extension wall 305. ing.

The retainer hooking portion 312 extends rightward from the lower end of the retainer base portion 310 and has a plate shape extending further downward. As shown in FIGS. 7 and 9, the bracket base 307 is provided with a bracket hooking hole 317 (engagement portion) penetrating in the thickness direction at a position corresponding to the retainer base 310 . The lower end of the retainer hooking portion 312 passes through the bracket hooking hole 317 and extends downward to the right to reach the right side of the bracket base portion 307 . Thereby, the lower end of the retainer 303 is hooked to the bracket 302 .

A through hole is provided in the retainer base 310 . The airbag module 23 is arranged along the left side of the retainer base 310 and is fastened to the left side of the retainer base 310 so that the male screw portion 44 passes through the through hole. At this time, as shown in FIG. 8, the airbag module 23 is positioned in front of the pan frame extension portion 32, and a gap S is formed between the airbag module 23 and the pan frame extension portion 32. .

The wire member 304 is a bent metal round bar and is connected to the left side frame 26 at both ends. A wire hooking portion 321 extending along the extending direction (vertical direction) of the side frame 26 is provided at the central portion of the wire member 304 . In this embodiment, the wire member 304 is welded to the sheet metal member 30 at both ends, and the wire hooking portion 321 is located in front of the bracket front portion 308, to the right of the airbag module 23, and to the left of the side frame 26. is doing. As in the first embodiment, the webbing 96 has one end sewn to the sewn portion 57 and the other end hooked to the wire hooking portion 321 using the hook 97 .

As shown in FIG. 6 , an operation member 325 having a lever 17 for adjusting the rotation angle of the seat back 5 with respect to the seat cushion 4 is provided at the upper left end of the seat back 5 . The operating member 325 is connected to the reclining mechanism by a wire (not shown) and plays a role of transmitting an input from the occupant to the lever 17 to the reclining mechanism. A passage 328 is formed in the pad member 21 covering the upper surface of the seat back 5 at a position corresponding to the operation member 325 so as to communicate vertically. In this embodiment, passage 328 is formed between front portion 50 and left side portion 51 . The lower end of the operating member 325 is inserted into the passage 328 and the extension wall 305 is positioned below the operating member 325 .

Next, effects of the vehicle seat 300 according to the second embodiment will be described. In the vehicle seat 300, as in the first embodiment, the airbag module 23 is positioned in front of the pan frame extension portion 32, and a gap S is provided between the airbag module 23 and the pan frame extension portion 32. It is This makes it difficult for the load applied to the back surface of the seat back 5 to be transmitted to the airbag module 23 .

By tightening the bolt 315 downward, the extension wall 305 and the retainer upper wall 311 are fastened. When tightening the bolt 315 , the tightening work can be performed by inserting a tool downward from above the seat back 5 . Accordingly, the fastening work is not hindered by the pan frame 20, and the assembly of the airbag module 23 is facilitated.

Further, the pad member 21 is formed with a passage 328 extending from above to the extension wall 305 . Therefore, there is no need to separately provide a passage 328 for inserting a tool in the pad member 21, and the configuration of the vehicle seat 300 is simple.

The retainer 303 is fastened to the side frame 26 at its upper portion, and is engaged with and latched to the bracket latching hole 317 at its lower portion. As a result, the retainer 303 is coupled to the side frame 26 at the upper and lower portions, so that the coupling between the retainer 303 and the side frame 26 is stronger than in the case where the retainer 303 and the side frame 26 are coupled only at the upper portion or the lower portion. As a result, the connection between the airbag module 23 and the side frame 26 is strengthened, and the posture of the airbag 41 during deployment can be stabilized.

<<Third Embodiment>>
A vehicle seat 400 according to the third embodiment differs from the first embodiment in the shapes of a bracket 401, a pan frame 402, and a retainer 403, and other parts are the same as those in the first embodiment. , the details of the shapes of the bracket 401, the pan frame 402, and the retainer 403 will be described below, and other descriptions will be omitted. As in the first embodiment, the side frame 26 is provided with a pair of upper and lower brackets 401. Since the lower bracket 401 and the upper bracket 401 are of the same type, only the upper bracket 401 will be described in detail. , and description of the lower bracket 401 is omitted.

As shown in FIG. 10, the bracket 401 has a substantially rectangular plate-shaped bracket base 405 having a surface facing in the left-right direction and extending in the front-rear and up-down directions, and a bracket front wall 406 extending rightward from the front edge of the bracket base 405 . , and a bracket rear wall 407 extending rightward from the rear edge of bracket base 405 . A flange 406A extending forward is provided on the right edge of the bracket front wall 406, and the bracket front wall 406 is welded to the left side surface of the sheet metal member 30 at the flange 406A. A rearwardly extending flange 407A is provided on the right edge of the bracket rear wall 407, and the bracket rear wall 407 is welded to the left side surface of the sheet metal member 30 at the flange 407A. The bracket base 405 is provided with a bracket engaging hole 408 penetrating in the thickness direction at a predetermined position.

The pan frame 402 includes a pan frame extending portion 410 extending leftward from the left side frame 26 as in the first embodiment. The pan frame extending portion 410 is formed by notching a plate material as a base material of the pan frame 402 at the rear of the bracket 401 in a U-shaped notch opening to the right and raising it forward. A cut-and-raised portion 411 is provided. The cut-and-raised portion 411 has a plate shape with a surface that slopes forward toward the outside of the vehicle. The cut-and-raised portion 411 has an upper side, a lower side, a left side, and a right side, and forms a substantially rectangular shape that is joined to the base material of the pan frame 402 at the right side. The cut-and-raised portion 411 is provided at a predetermined position with a bolt hole 412 penetrating in its thickness direction.

As shown in FIG. 11, the retainer 403 is formed of a sheet metal member that is bent in the same manner as in the first embodiment. It has a plate-shaped retainer inclined wall 415 inclined rightward toward the rear, and two pairs of upper and lower retainer locking walls 416 connected to the front edge of the retainer base 414 . The airbag module 23 is fastened to the retainer base 414 at a predetermined position, as in the first embodiment. The airbag module 23 is positioned in front of the pan frame extension portion 410 , and a gap S is formed between the airbag module 23 and the pan frame extension portion 410 .

The retainer inclined wall 415 is arranged along the front surface of the cut-and-raised portion 411 . A bolt hole 417 is formed through the retainer inclined wall 415 in the thickness direction. The retainer inclined wall 415 and the cut-and-raised portion 411 are fastened using bolts 418 passing through two bolt holes 412 and 417 . This joins the rear portion of retainer 403 to pan frame 402 .

Each retainer locking wall 416 passes through the bracket locking hole 408 from the left side of the bracket base 405 , extends to the right side of the bracket base 405 , and is hooked to the edge of the bracket locking hole 408 . As a result, retainer locking wall 416 is restricted from moving leftward, and the front portion of retainer 403 is coupled to bracket 401 . In this embodiment, the retainer locking walls 416 are provided at the front edge of the retainer base 414 at positions corresponding to the bracket locking holes 408 of the upper and lower brackets 401 respectively.

In this embodiment, a backboard 420 is provided behind the pan frame 402 to cover the cut-and-raised portion 411 from behind. The backboard 420 is a plate member made of resin and has substantially the same shape as the pan frame 402 . A plurality of board hooks 421 projecting forward are provided along the left edge on the front surface of the backboard 420 . A plurality of holes are provided in the rear edge of the left side sheet member 55 , and the left side sheet member 55 is coupled to the backboard 420 by hooking the holes to the board hooking portion 421 . Backboard 420 is fastened to pan frame 402 at a predetermined location.

In this embodiment, no wire member is provided, and the webbing 423 is hooked to the bracket 401 . More specifically, the webbing 423 has one end sewn to the sewn portion 57, passes between the front portion 50 and the left side portion 51, and reaches the bracket locking hole 408, as in the first embodiment. A predetermined hook 424 is provided at the other end of the webbing 423 and hooked to the bracket locking hole 408 .

Next, effects of the vehicle seat 400 according to the third embodiment will be described. In the vehicle seat 400, as in the first embodiment, the airbag module 23 is positioned in front of the pan frame extension portion 410, and a gap S is provided between the airbag module 23 and the pan frame extension portion 410. It is This makes it difficult for the load applied to the back surface of the seat back 5 to be transmitted to the airbag module 23 .

Since the retainer inclined wall 415 is fastened to the rear surface of the cut-and-raised portion 411, the retainer inclined wall 415 and the cut-and-raised portion 411 can be visually recognized from the rear of the pan frame 402 at the time of fastening, and both can be easily aligned. can be placed. Further, since the retainer 403 is connected to the side frame 26 and the pan frame 402, the airbag 41 can be stably supported by the seatback frame 18. As shown in FIG.

Although the specific embodiments have been described above, the present invention is not limited to the above embodiments and can be widely modified. In the above embodiment, the present invention is applied to the second row of rear seats, but is not limited to the second row, and may be applied to the third and subsequent rows of rear seats. Also, webbing and wire members are not essential, and a plurality of webbings, a plurality of wire members, and the like may be provided.

Reference Signs List 1: Vehicle seat 5: Seat back 19: Seat back frame frame 20: Pan frame (plate)
23: Airbag module 26: Side frame (side member)
32: Pan frame extension 36: Bracket (first mounting member)
47: retainer (second mounting member)
64: Bracket inclined wall 65: Bolt hole (fastening portion)
300: Vehicle seat 301 according to the second embodiment: Side frame (side member)
302: Bracket (first mounting member)
303: retainer (second mounting member)
305: Extension wall 311: Retainer upper wall 312: Retainer hooking portion (engaging portion)
400: Vehicle seat 401 according to the third embodiment: Bracket (first attachment member)
402: pan frame 403: retainer (second mounting member)
410: pan frame extension (extension)
411: Cut-and-raised portion S: Gap

Claims (5)

a frame-shaped seat back frame portion including a pair of left and right side members extending vertically and forming a framework of the seat back;
a plate-shaped plate disposed behind the seat back frame and having an extension portion extending outward of the vehicle outside of the side member;
a mounting member coupled to the side member;
an airbag module disposed in front of the extending portion and coupled to the side member via the mounting member;
A gap is provided between the airbag module and the extension ,
The mounting member includes a first mounting member directly coupled to the side member and a second mounting member directly coupled to the airbag module,
The second mounting member is fastened to the first mounting member using fasteners,
A vehicle seat , wherein the plate is provided with a through hole penetrating along the axis of the fastener . The first mounting member includes a slanted wall that is slanted toward the vehicle interior toward the rear at the rear portion,
2. The vehicle seat according to claim 1 , wherein the inclined wall is provided with a fastening portion to which the second mounting member is fastened. The second mounting member has a plate-like fastened portion along the inclined wall at the rear,
3. The vehicle seat according to claim 2 , wherein the airbag module has an airbag that deploys forward, and is coupled to the second mounting member on the front side of the fastening portion. a frame-shaped seat back frame portion including a pair of left and right side members extending vertically and forming a framework of the seat back;
a plate-shaped plate disposed behind the seat back frame and having an extension portion extending outward of the vehicle outside of the side member;
a mounting member coupled to the side member;
an airbag module disposed in front of the extending portion and coupled to the side member via the mounting member;
A gap is provided between the airbag module and the extension,
The side member outside the vehicle extends outside the vehicle and includes an extension wall having a surface facing upward,
The mounting member includes a first mounting member coupled to the vehicle-exterior side surface of the vehicle-exterior side member, and an upper end that extends toward the vehicle interior along the upper surface of the extension wall and is fastened to the extension wall. and a second mounting member having a wall and engaging said first mounting member at its lower end. a frame-shaped seat back frame portion including a pair of left and right side members extending vertically and forming a framework of the seat back;
a plate-shaped plate disposed behind the seat back frame and having an extension portion extending outward of the vehicle outside of the side member;
a mounting member coupled to the side member;
an airbag module disposed in front of the extending portion and coupled to the side member via the mounting member;
A gap is provided between the airbag module and the extension,
The extending portion is provided with a cut-and-raised portion that is cut and raised forward,
The mounting member directly connects the airbag module to a first mounting member that is connected to the vehicle-exterior side surface of the vehicle-exterior side member. and a second mounting member fastened at an end to the rear surface of the cut-and-raised portion.

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